Debug logs from impacted targets script

hack/get_impacted_targets.sh

@@ -9,7 +9,10 @@ workspace_dir="$(pwd)"
 
 $BAZEL_B //:bazel-diff
 
+set -x
+
 # Generate starting hashes
+echo "Base hash is $PULL_BASE_SHA"
 git checkout "$PULL_BASE_SHA" --quiet
 bazel-bin/bazel-diff generate-hashes -w "$workspace_dir" -b "$bazel_bin" starting_hashes_json
 
@@ -18,6 +21,7 @@ TARGET_HASH="$PULL_PULL_SHA"
 if [[ -z "$TARGET_HASH" ]]; then
   TARGET_HASH="$(git log "HEAD@{1}" --pretty=format:"%H" --merges -n 1)"
 fi
+echo "Target hash is $PULL_PULL_SHA"
 git checkout "$PULL_PULL_SHA" --quiet
 bazel-bin/bazel-diff generate-hashes -w "$workspace_dir" -b "$bazel_bin" ending_hashes_json